Try turning down the temperature, when they are to warm they will pick at each other. I turn the temp down 1 degree every day for all my brooding birds and haven't had any problems, but I have Corturnix and chickens. I understand Bobwhites can be a little meaner, especially the Tennessee Reds, which my son wants, so I've been watching the Bobwhite threads. I've read when they start picking toes, turn the temp down.
Make sure they don't run out of food and have cool water, change it 3 times a day. Just ideas to try, cause I know birds get knarly when they get hot, don't we all.